Why not just use a current transformer? (Clamp over wire type) It's much safer.

Do you know of a Zigbee one? That's also a good option.

Some options at the $10 price point on AliExpress, though I cannot recommend one, maybe another reader can. CTs are the generally accepted way to do this and don't have to modify mains wiring. Could also build your own; CTs are inexpensive.

Thanks Dad.

A bit funny, but I personally found "please learn to never..." to be MUCH more off-putting and patronizing than the "why not just...".

Maybe just something about the latter being interpreted as a question, and the former being interpreted as an order.

The fire hazard from the cheap breaker is still present. Your existing one protects the downstream circuit but the Chinese breaker itself is a safety hazard.

You should care about the quality of these devices, especially ones that provide safety.

Just a nit: The Chinese breaker isn't providing safety. You should still be caring about its quality because it's handling a lot of current (and potential power).